Title :
An enhanced spectrum method for GPS weak signal acquisition
Author :
Wei, Chao-Jun ; Sun, Song-Lin ; Jing, Xiao-Jun ; Huang, Hai
Author_Institution :
Sch. of Inf. & Commun. Eng., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
FFT and IFFT are used to achieve two-dimension parallel acquisition for GPS signal. But peak of correct result is declined because of frequency resolution and navigation data transition and it results in error detecting. A method in frequency domain was proposed to ensure that the most probable Pseudo Random Noise (PRN) code phase and Doppler frequency could be detected. As the simulation showed, the method could eliminate jitter and relocate the correct peak under a Weak Signal Environment (WSE).
Keywords :
Global Positioning System; signal detection; spread spectrum communication; Doppler frequency; GPS weak signal acquisition; enhanced spectrum method; frequency domain; frequency resolution; navigation data transition; pseudo random noise code phase; two-dimension parallel acquisition; weak signal environment; Correlation; Doppler effect; Frequency domain analysis; Global Positioning System; Receivers; Software; FFT/IFFT; GPS; Weak Signal Environment; frequency-domain enhancement; two-dimension parallel acquisition;
Conference_Titel :
Geoscience and Remote Sensing (IITA-GRS), 2010 Second IITA International Conference on
Conference_Location :
Qingdao
Print_ISBN :
978-1-4244-8514-7
DOI :
10.1109/IITA-GRS.2010.5602603
